/**
  ******************************************************************************
  * @file    usbd_req.c
  * @author  MCD Application Team
  * @version V1.1.0
  * @date    19-March-2012
  * @brief   This file provides the standard USB requests following chapter 9.
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "usbd_req.h"
#include "usbd_ioreq.h"
#include "usbd_desc.h"


/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
  * @{
  */


/** @defgroup USBD_REQ
  * @brief USB standard requests module
  * @{
  */

/** @defgroup USBD_REQ_Private_TypesDefinitions
  * @{
  */
/**
  * @}
  */


/** @defgroup USBD_REQ_Private_Defines
  * @{
  */

/**
  * @}
  */


/** @defgroup USBD_REQ_Private_Macros
  * @{
  */
/**
  * @}
  */


/** @defgroup USBD_REQ_Private_Variables
  * @{
  */
extern __IO USB_OTG_DCTL_TypeDef SET_TEST_MODE;

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
#pragma data_alignment=4
#endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN uint32_t USBD_ep_status __ALIGN_END  = 0;

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
#pragma data_alignment=4
#endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN uint32_t  USBD_default_cfg __ALIGN_END  = 0;

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
#pragma data_alignment=4
#endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN uint32_t  USBD_cfg_status __ALIGN_END  = 0;

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
#pragma data_alignment=4
#endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN uint8_t USBD_StrDesc[USB_MAX_STR_DESC_SIZ] __ALIGN_END ;
/**
  * @}
  */


/** @defgroup USBD_REQ_Private_FunctionPrototypes
  * @{
  */
static void USBD_GetDescriptor(USB_OTG_CORE_HANDLE  *pdev,
                               USB_SETUP_REQ *req);

static void USBD_SetAddress(USB_OTG_CORE_HANDLE  *pdev,
                            USB_SETUP_REQ *req);

static void USBD_SetConfig(USB_OTG_CORE_HANDLE  *pdev,
                           USB_SETUP_REQ *req);

static void USBD_GetConfig(USB_OTG_CORE_HANDLE  *pdev,
                           USB_SETUP_REQ *req);

static void USBD_GetStatus(USB_OTG_CORE_HANDLE  *pdev,
                           USB_SETUP_REQ *req);

static void USBD_SetFeature(USB_OTG_CORE_HANDLE  *pdev,
                            USB_SETUP_REQ *req);

static void USBD_ClrFeature(USB_OTG_CORE_HANDLE  *pdev,
                            USB_SETUP_REQ *req);

static uint8_t USBD_GetLen(uint8_t *buf);
/**
  * @}
  */


/** @defgroup USBD_REQ_Private_Functions
  * @{
  */


/**
* @brief  USBD_StdDevReq
*         Handle standard usb device requests
* @param  pdev: device instance
* @param  req: usb request
* @retval status
*/
USBD_Status  USBD_StdDevReq(USB_OTG_CORE_HANDLE  *pdev, USB_SETUP_REQ  *req)
{
    USBD_Status ret = USBD_OK;

    switch(req->bRequest)
    {
        case USB_REQ_GET_DESCRIPTOR:
            USBD_GetDescriptor(pdev, req) ;
            break;

        case USB_REQ_SET_ADDRESS:
            USBD_SetAddress(pdev, req);
            break;

        case USB_REQ_SET_CONFIGURATION:
            USBD_SetConfig(pdev, req);
            break;

        case USB_REQ_GET_CONFIGURATION:
            USBD_GetConfig(pdev, req);
            break;

        case USB_REQ_GET_STATUS:
            USBD_GetStatus(pdev, req);
            break;

        case USB_REQ_SET_FEATURE:
            USBD_SetFeature(pdev, req);
            break;

        case USB_REQ_CLEAR_FEATURE:
            USBD_ClrFeature(pdev, req);
            break;

        default:
            USBD_CtlError(pdev, req);
            break;
    }

    return ret;
}

/**
* @brief  USBD_StdItfReq
*         Handle standard usb interface requests
* @param  pdev: USB OTG device instance
* @param  req: usb request
* @retval status
*/
USBD_Status  USBD_StdItfReq(USB_OTG_CORE_HANDLE  *pdev, USB_SETUP_REQ  *req)
{
    USBD_Status ret = USBD_OK;

    switch(pdev->dev.device_status)
    {
        case USB_OTG_CONFIGURED:
            if(LOBYTE(req->wIndex) <= USBD_ITF_MAX_NUM)
            {
                pdev->dev.class_cb->Setup(pdev, req);

                if((req->wLength == 0) && (ret == USBD_OK))
                {
                    USBD_CtlSendStatus(pdev);
                }
            }
            else
            {
                USBD_CtlError(pdev, req);
            }

            break;

        default:
            USBD_CtlError(pdev, req);
            break;
    }

    return ret;
}

/**
* @brief  USBD_StdEPReq
*         Handle standard usb endpoint requests
* @param  pdev: USB OTG device instance
* @param  req: usb request
* @retval status
*/
USBD_Status  USBD_StdEPReq(USB_OTG_CORE_HANDLE  *pdev, USB_SETUP_REQ  *req)
{
    uint8_t   ep_addr;
    USBD_Status ret = USBD_OK;
    ep_addr  = LOBYTE(req->wIndex);

    switch(req->bRequest)
    {
        case USB_REQ_SET_FEATURE :
            switch(pdev->dev.device_status)
            {
                case USB_OTG_ADDRESSED:
                    if((ep_addr != 0x00) && (ep_addr != 0x80))
                    {
                        DCD_EP_Stall(pdev, ep_addr);
                    }

                    break;

                case USB_OTG_CONFIGURED:
                    if(req->wValue == USB_FEATURE_EP_HALT)
                    {
                        if((ep_addr != 0x00) && (ep_addr != 0x80))
                        {
                            DCD_EP_Stall(pdev, ep_addr);
                        }
                    }

                    pdev->dev.class_cb->Setup(pdev, req);
                    USBD_CtlSendStatus(pdev);
                    break;

                default:
                    USBD_CtlError(pdev, req);
                    break;
            }

            break;

        case USB_REQ_CLEAR_FEATURE :
            switch(pdev->dev.device_status)
            {
                case USB_OTG_ADDRESSED:
                    if((ep_addr != 0x00) && (ep_addr != 0x80))
                    {
                        DCD_EP_Stall(pdev, ep_addr);
                    }

                    break;

                case USB_OTG_CONFIGURED:
                    if(req->wValue == USB_FEATURE_EP_HALT)
                    {
                        if((ep_addr != 0x00) && (ep_addr != 0x80))
                        {
                            DCD_EP_ClrStall(pdev, ep_addr);
                            pdev->dev.class_cb->Setup(pdev, req);
                        }

                        USBD_CtlSendStatus(pdev);
                    }

                    break;

                default:
                    USBD_CtlError(pdev, req);
                    break;
            }

            break;

        case USB_REQ_GET_STATUS:
            switch(pdev->dev.device_status)
            {
                case USB_OTG_ADDRESSED:
                    if((ep_addr != 0x00) && (ep_addr != 0x80))
                    {
                        DCD_EP_Stall(pdev, ep_addr);
                    }

                    break;

                case USB_OTG_CONFIGURED:
                    if((ep_addr & 0x80) == 0x80)
                    {
                        if(pdev->dev.in_ep[ep_addr & 0x7F].is_stall)
                        {
                            USBD_ep_status = 0x0001;
                        }
                        else
                        {
                            USBD_ep_status = 0x0000;
                        }
                    }
                    else if((ep_addr & 0x80) == 0x00)
                    {
                        if(pdev->dev.out_ep[ep_addr].is_stall)
                        {
                            USBD_ep_status = 0x0001;
                        }
                        else
                        {
                            USBD_ep_status = 0x0000;
                        }
                    }

                    USBD_CtlSendData(pdev,
                                     (uint8_t *)&USBD_ep_status,
                                     2);
                    break;

                default:
                    USBD_CtlError(pdev, req);
                    break;
            }

            break;

        default:
            break;
    }

    return ret;
}
/**
* @brief  USBD_GetDescriptor
*         Handle Get Descriptor requests
* @param  pdev: device instance
* @param  req: usb request
* @retval status
*/
static void USBD_GetDescriptor(USB_OTG_CORE_HANDLE  *pdev,
                               USB_SETUP_REQ *req)
{
    uint16_t len;
    uint8_t *pbuf;

    switch(req->wValue >> 8)
    {
        case USB_DESC_TYPE_DEVICE:
            pbuf = pdev->dev.usr_device->GetDeviceDescriptor(pdev->cfg.speed, &len);

            if((req->wLength == 64) || (pdev->dev.device_status == USB_OTG_DEFAULT))
            {
                len = 8;
            }

            break;

        case USB_DESC_TYPE_CONFIGURATION:
            pbuf   = (uint8_t *)pdev->dev.class_cb->GetConfigDescriptor(pdev->cfg.speed, &len);
#ifdef USB_OTG_HS_CORE

            if((pdev->cfg.speed == USB_OTG_SPEED_FULL) &&
                    (pdev->cfg.phy_itface  == USB_OTG_ULPI_PHY))
            {
                pbuf   = (uint8_t *)pdev->dev.class_cb->GetOtherConfigDescriptor(pdev->cfg.speed, &len);
            }

#endif
            pbuf[1] = USB_DESC_TYPE_CONFIGURATION;
            pdev->dev.pConfig_descriptor = pbuf;
            break;

        case USB_DESC_TYPE_STRING:
            switch((uint8_t)(req->wValue))
            {
                case USBD_IDX_LANGID_STR:
                    pbuf = pdev->dev.usr_device->GetLangIDStrDescriptor(pdev->cfg.speed, &len);
                    break;

                case USBD_IDX_MFC_STR:
                    pbuf = pdev->dev.usr_device->GetManufacturerStrDescriptor(pdev->cfg.speed, &len);
                    break;

                case USBD_IDX_PRODUCT_STR:
                    pbuf = pdev->dev.usr_device->GetProductStrDescriptor(pdev->cfg.speed, &len);
                    break;

                case USBD_IDX_SERIAL_STR:
                    pbuf = pdev->dev.usr_device->GetSerialStrDescriptor(pdev->cfg.speed, &len);
                    break;

                case USBD_IDX_CONFIG_STR:
                    pbuf = pdev->dev.usr_device->GetConfigurationStrDescriptor(pdev->cfg.speed, &len);
                    break;

                case USBD_IDX_INTERFACE_STR:
                    pbuf = pdev->dev.usr_device->GetInterfaceStrDescriptor(pdev->cfg.speed, &len);
                    break;

                default:
#ifdef USB_SUPPORT_USER_STRING_DESC
                    pbuf = pdev->dev.class_cb->GetUsrStrDescriptor(pdev->cfg.speed, (req->wValue), &len);
                    break;
#else
                    USBD_CtlError(pdev, req);
                    return;
#endif /* USBD_CtlError(pdev , req); */
            }

            break;

        case USB_DESC_TYPE_DEVICE_QUALIFIER:
#ifdef USB_OTG_HS_CORE
            if(pdev->cfg.speed == USB_OTG_SPEED_HIGH)
            {
                pbuf   = (uint8_t *)pdev->dev.class_cb->GetConfigDescriptor(pdev->cfg.speed, &len);
                USBD_DeviceQualifierDesc[4] = pbuf[14];
                USBD_DeviceQualifierDesc[5] = pbuf[15];
                USBD_DeviceQualifierDesc[6] = pbuf[16];
                pbuf = USBD_DeviceQualifierDesc;
                len  = USB_LEN_DEV_QUALIFIER_DESC;
                break;
            }
            else
            {
                USBD_CtlError(pdev, req);
                return;
            }

#else
            USBD_CtlError(pdev, req);
            return;
#endif

        case USB_DESC_TYPE_OTHER_SPEED_CONFIGURATION:
#ifdef USB_OTG_HS_CORE
            if(pdev->cfg.speed == USB_OTG_SPEED_HIGH)
            {
                pbuf   = (uint8_t *)pdev->dev.class_cb->GetOtherConfigDescriptor(pdev->cfg.speed, &len);
                pbuf[1] = USB_DESC_TYPE_OTHER_SPEED_CONFIGURATION;
                break;
            }
            else
            {
                USBD_CtlError(pdev, req);
                return;
            }

#else
            USBD_CtlError(pdev, req);
            return;
#endif

        default:
            USBD_CtlError(pdev, req);
            return;
    }

    if((len != 0) && (req->wLength != 0))
    {
        len = MIN(len, req->wLength);
        USBD_CtlSendData(pdev,
                         pbuf,
                         len);
    }
}

/**
* @brief  USBD_SetAddress
*         Set device address
* @param  pdev: device instance
* @param  req: usb request
* @retval status
*/
static void USBD_SetAddress(USB_OTG_CORE_HANDLE  *pdev,
                            USB_SETUP_REQ *req)
{
    uint8_t  dev_addr;

    if((req->wIndex == 0) && (req->wLength == 0))
    {
        dev_addr = (uint8_t)(req->wValue) & 0x7F;

        if(pdev->dev.device_status == USB_OTG_CONFIGURED)
        {
            USBD_CtlError(pdev, req);
        }
        else
        {
            pdev->dev.device_address = dev_addr;
            DCD_EP_SetAddress(pdev, dev_addr);
            USBD_CtlSendStatus(pdev);

            if(dev_addr != 0)
            {
                pdev->dev.device_status  = USB_OTG_ADDRESSED;
            }
            else
            {
                pdev->dev.device_status  = USB_OTG_DEFAULT;
            }
        }
    }
    else
    {
        USBD_CtlError(pdev, req);
    }
}

/**
* @brief  USBD_SetConfig
*         Handle Set device configuration request
* @param  pdev: device instance
* @param  req: usb request
* @retval status
*/
static void USBD_SetConfig(USB_OTG_CORE_HANDLE  *pdev,
                           USB_SETUP_REQ *req)
{
    static uint8_t  cfgidx;
    cfgidx = (uint8_t)(req->wValue);

    if(cfgidx > USBD_CFG_MAX_NUM)
    {
        USBD_CtlError(pdev, req);
    }
    else
    {
        switch(pdev->dev.device_status)
        {
            case USB_OTG_ADDRESSED:
                if(cfgidx)
                {
                    pdev->dev.device_config = cfgidx;
                    pdev->dev.device_status = USB_OTG_CONFIGURED;
                    USBD_SetCfg(pdev, cfgidx);
                    USBD_CtlSendStatus(pdev);
                }
                else
                {
                    USBD_CtlSendStatus(pdev);
                }

                break;

            case USB_OTG_CONFIGURED:
                if(cfgidx == 0)
                {
                    pdev->dev.device_status = USB_OTG_ADDRESSED;
                    pdev->dev.device_config = cfgidx;
                    USBD_ClrCfg(pdev, cfgidx);
                    USBD_CtlSendStatus(pdev);
                }
                else  if(cfgidx != pdev->dev.device_config)
                {
                    /* Clear old configuration */
                    USBD_ClrCfg(pdev, pdev->dev.device_config);
                    /* set new configuration */
                    pdev->dev.device_config = cfgidx;
                    USBD_SetCfg(pdev, cfgidx);
                    USBD_CtlSendStatus(pdev);
                }
                else
                {
                    USBD_CtlSendStatus(pdev);
                }

                break;

            default:
                USBD_CtlError(pdev, req);
                break;
        }
    }
}

/**
* @brief  USBD_GetConfig
*         Handle Get device configuration request
* @param  pdev: device instance
* @param  req: usb request
* @retval status
*/
static void USBD_GetConfig(USB_OTG_CORE_HANDLE  *pdev,
                           USB_SETUP_REQ *req)
{
    if(req->wLength != 1)
    {
        USBD_CtlError(pdev, req);
    }
    else
    {
        switch(pdev->dev.device_status)
        {
            case USB_OTG_ADDRESSED:
                USBD_CtlSendData(pdev,
                                 (uint8_t *)&USBD_default_cfg,
                                 1);
                break;

            case USB_OTG_CONFIGURED:
                USBD_CtlSendData(pdev,
                                 &pdev->dev.device_config,
                                 1);
                break;

            default:
                USBD_CtlError(pdev, req);
                break;
        }
    }
}

/**
* @brief  USBD_GetStatus
*         Handle Get Status request
* @param  pdev: device instance
* @param  req: usb request
* @retval status
*/
static void USBD_GetStatus(USB_OTG_CORE_HANDLE  *pdev,
                           USB_SETUP_REQ *req)
{
    switch(pdev->dev.device_status)
    {
        case USB_OTG_ADDRESSED:
        case USB_OTG_CONFIGURED:
#ifdef USBD_SELF_POWERED
            USBD_cfg_status = USB_CONFIG_SELF_POWERED;
#else
            USBD_cfg_status = 0x00;
#endif

            if(pdev->dev.DevRemoteWakeup)
            {
                USBD_cfg_status |= USB_CONFIG_REMOTE_WAKEUP;
            }

            USBD_CtlSendData(pdev,
                             (uint8_t *)&USBD_cfg_status,
                             2);
            break;

        default :
            USBD_CtlError(pdev, req);
            break;
    }
}


/**
* @brief  USBD_SetFeature
*         Handle Set device feature request
* @param  pdev: device instance
* @param  req: usb request
* @retval status
*/
static void USBD_SetFeature(USB_OTG_CORE_HANDLE  *pdev,
                            USB_SETUP_REQ *req)
{
    USB_OTG_DCTL_TypeDef     dctl;
    uint8_t test_mode = 0;

    if(req->wValue == USB_FEATURE_REMOTE_WAKEUP)
    {
        pdev->dev.DevRemoteWakeup = 1;
        pdev->dev.class_cb->Setup(pdev, req);
        USBD_CtlSendStatus(pdev);
    }
    else if((req->wValue == USB_FEATURE_TEST_MODE) &&
            ((req->wIndex & 0xFF) == 0))
    {
        dctl.d32 = USB_OTG_READ_REG32(&pdev->regs.DREGS->DCTL);
        test_mode = req->wIndex >> 8;

        switch(test_mode)
        {
            case 1: // TEST_J
                dctl.b.tstctl = 1;
                break;

            case 2: // TEST_K
                dctl.b.tstctl = 2;
                break;

            case 3: // TEST_SE0_NAK
                dctl.b.tstctl = 3;
                break;

            case 4: // TEST_PACKET
                dctl.b.tstctl = 4;
                break;

            case 5: // TEST_FORCE_ENABLE
                dctl.b.tstctl = 5;
                break;
        }

        SET_TEST_MODE = dctl;
        pdev->dev.test_mode = 1;
        USBD_CtlSendStatus(pdev);
    }
}


/**
* @brief  USBD_ClrFeature
*         Handle clear device feature request
* @param  pdev: device instance
* @param  req: usb request
* @retval status
*/
static void USBD_ClrFeature(USB_OTG_CORE_HANDLE  *pdev,
                            USB_SETUP_REQ *req)
{
    switch(pdev->dev.device_status)
    {
        case USB_OTG_ADDRESSED:
        case USB_OTG_CONFIGURED:
            if(req->wValue == USB_FEATURE_REMOTE_WAKEUP)
            {
                pdev->dev.DevRemoteWakeup = 0;
                pdev->dev.class_cb->Setup(pdev, req);
                USBD_CtlSendStatus(pdev);
            }

            break;

        default :
            USBD_CtlError(pdev, req);
            break;
    }
}

/**
* @brief  USBD_ParseSetupRequest
*         Copy buffer into setup structure
* @param  pdev: device instance
* @param  req: usb request
* @retval None
*/

void USBD_ParseSetupRequest(USB_OTG_CORE_HANDLE  *pdev,
                            USB_SETUP_REQ *req)
{
    req->bmRequest     = *(uint8_t *)(pdev->dev.setup_packet);
    req->bRequest      = *(uint8_t *)(pdev->dev.setup_packet +  1);
    req->wValue        = SWAPBYTE(pdev->dev.setup_packet +  2);
    req->wIndex        = SWAPBYTE(pdev->dev.setup_packet +  4);
    req->wLength       = SWAPBYTE(pdev->dev.setup_packet +  6);
    pdev->dev.in_ep[0].ctl_data_len = req->wLength  ;
    pdev->dev.device_state = USB_OTG_EP0_SETUP;
}

/**
* @brief  USBD_CtlError
*         Handle USB low level Error
* @param  pdev: device instance
* @param  req: usb request
* @retval None
*/

void USBD_CtlError(USB_OTG_CORE_HANDLE  *pdev,
                   USB_SETUP_REQ *req)
{
    DCD_EP_Stall(pdev, 0x80);
    DCD_EP_Stall(pdev, 0);
    USB_OTG_EP0_OutStart(pdev);
}


/**
  * @brief  USBD_GetString
  *         Convert Ascii string into unicode one
  * @param  desc : descriptor buffer
  * @param  unicode : Formatted string buffer (unicode)
  * @param  len : descriptor length
  * @retval None
  */
void USBD_GetString(uint8_t *desc, uint8_t *unicode, uint16_t *len)
{
    uint8_t idx = 0;

    if(desc != NULL)
    {
        *len =  USBD_GetLen(desc) * 2 + 2;
        unicode[idx++] = *len;
        unicode[idx++] =  USB_DESC_TYPE_STRING;

        while(*desc != NULL)
        {
            unicode[idx++] = *desc++;
            unicode[idx++] =  0x00;
        }
    }
}

/**
  * @brief  USBD_GetLen
  *         return the string length
   * @param  buf : pointer to the ascii string buffer
  * @retval string length
  */
static uint8_t USBD_GetLen(uint8_t *buf)
{
    uint8_t  len = 0;

    while(*buf != NULL)
    {
        len++;
        buf++;
    }

    return len;
}
/**
  * @}
  */


/**
  * @}
  */


/**
  * @}
  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
